Circular swing



March 14, 1939. w. STAMPFLI CIRCULAR vSWING Original Filed Oct; 15, 1936ATTORNEVS jl mkll 5/42/5 22 Patented Mar. 14, 1939 UNITED STATESCIRCULAR SWING Wendell Phillips Stampfli, Monahans, Tex.

Application October 15, 1936, Serial No. 105,833 Renewed August 3, 19382 Claims.

The invention relates to pull rod swings and more especially toacircular swing.

The primary object of the invention is: the provision of a swing of thischaracter, wherein pull 5 rods will operate at an angle and all sidesweep is eliminated which generally causes breakage of the pull rods anda straight pull forward and backward is assured, the swing beingadaptable for pumping machinery for oil or water wells.

10 Another object of the invention is the provision of a swing of thischaracter, wherein a short length of flexible wire is employed so thatshocks and vibration will beabsorbed during the working of the pull rodsand also enables the working 15 of the said rods at varying angles.

A further object of the invention is the provision of a swing of thischaracter, wherein but a single bearing is required and elimination ofside sweep in the rod lines is assured.

20 A still further object of the invention is the provision of a swingof this character, which is simple in construction, thoroughly reliableand effective in its operation, strong, durable, and inexpensive tomanufacture and install,

25 With these and other objects in View, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawing, which discloses the 30 preferred embodiment of the inventionand pointed out in the claims hereunto appended.

In the accompanying drawing: Figure 1 is a top. plan viewof pull rodlines showing the swings constructed in accordance 35 with the inventionassociated therewith.

Figure '2 is a top plan view of one of the swings.

' Figure 3 is a side elevation of one of the swings.

Figure 4 is an end elevation. 40 Figure 5 is an opposite end, elevation.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawing.

Referring to the drawing in detail, A designates 45 generally a seriesof pull rods, these in the arrangement are disposed at different angleswith respect to each other and are operated from a power house B. At theadjacent ends of the rods A are cross pieces Ill and H, respectively,the

50 rods being anchored therein in any suitable manner preferably througha swivel connection and to these pieces are fitted flexible loops l2 andI3, respectively, the cross head l being of less length than the headII. The loops l2 and i3 by reason 5 of the points of connection thereofwith said cross heads will have the loop l2 of less width than the loopl3. The loops I2 and I3 are reversely trained over a swing and in thisinstance one being indicated at M and the otherat I5, respectively. Eachswing l4 and I5 is formed with a 5 central bearing Hi from which projectarms which may be termed radial spokes ll supporting a circular pullmember l8, the outer periphery of this member being provided withseating grooves IQ for the reversely disposed loops I2 and I3. The pullmember of each swing l4 and i5 is provided with notches 20 formingcontinuations of the channels or grooves I9 so that a closed outer end2| of each loop can be saddled at the end of the said member and seatedin the notch therefor, in conformity with the reversed disposition ofthe loops when trained over the member and engaged in the channels orgrooves IS, the side stretches of the loop-s being received in thesegrooves. The swings I4 20 and I5 allow angular disposition of the rods Awith respect to each other and at the same time avoid any possibility ofside sweep which results in the breakage of the pull rods and at thesame time assures a straight pull forward and backward of such rods whenin operation.

The flexible loops I 2 and I 3 function to absorb shocks and vibrationsduring the working of the pull rods.

Each swing l4 and I5 at the bearing Hi thereof is journaled on a studarbor 22 suitably supported to properly locate the swing in the riggingof the pull rods A, the latter being oper ated from the power unit B.

It should be apparent from Figures 1 and 2 of the drawing that there isbut one central bearing for each swing l4 and I5 thus there iseliminated the usual bearings as is common in the standard types ofswings now employed in pumping machinery for oil or water wells.

The rods in the arrangement thereof in the rigging for pumping machineryor the like can be disposed at any angle up to one hundred and eightydegrees and the circular portion or member of each swing gives astraight pull back and forth eliminating side sweep and minimizingvibration, which in turn causes pull rods to break as with the angulartypes of swings now in use. The loops engaged on the circular members ofthe swings serve to deaden' vibration and such swing automaticallyadjusts itself when put into operation, particularly on installationrequiring a lesser degree of angular set up than originally ordered andan angular arrangement of the rods at one hundred and eighty degrees orless in the rigging will assure perfect working under the inprising, aswing structure fashioned with a spider formed with an arcuate member atthe outer end thereof provided with a pair of circumferentiallyextending grooves terminating in the connecting cable retaining channelformed in an outer endface thereof and embracing a similar pair ofcoextending grooves terminating in a like channel formed in the oppositeface thereof, pull rods, and flexible loops coupled 'with said pull rodsand reversely trained over. said arcuate member 10 and saddled in saidchannels;

WENDELL PHILLIPS STAMZPFLI.

